Composition for preventing leakage of air through punctures in pneumatic tires.



unrrnn STATES PATENT OFFICE.

LOUIS HENRY ROGERS AND ALEXANDER MYERS, OF WELLINGTON, NEW ZEALAND.

COMPOSITION FOR PREVENTING LEAKAGE OF AIR THROUGH PUNCTURES IN PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Nov. '24, 1908.

Application filed January 27, 1908. Serial No. 412,847.

To all whom 'it may concern:

Be it known that we, LoUIs HENRY Romans, :1 subject of His Majesty the King of Great Britain and Ireland, residing at 227 \Villis street. \Vellington, in the Provincial District of \Vellington, Dominion of New Zealand, and Annimxpnn MYERS, a subject of His Majesty the King of Great Britain and Ireland, residing at Wellington, in the Provincial District of Wellington, Dominion of New Zealand. have invented certain new and useful Improvements in Composition for Preventing Leakage of Air Through Punctures in Pneumatic Tires, of which the following is a specification.

This invention provides a composition for preventing the escape of air through punctures in pneumatic tires.

The composition also adds to the life of the tires by preserving the india rubber, and consists of lime wash, or more particularly silicious lime stone which has been calcined and crushed, casein and water.

The proportions of the ingredients are as follows Silicious lime stone calcined and crushed 87. 5 parts Casein 8. 3

Silica 13. 5 parts. Silicates insoluble in acid 3. 4:

Phosphate of calcium and alumina 2. 5 Magnesium carbonate 15. 6 Calcium carbonate 39. 2 Calcium hydrate 13.4

To use the composition, about three or four ounces are introduced into the tire by means of the usual pump or otherwise. The composition remains in a liquid or semiliquid state in the tire, and-immediately a puncture occurs, the composition flows there into and congeals, effectually stopping the escape of air from the tire.

Having now particularly described and ascertained the nature of our said invention, and in what manner the same is to be performed, we declare that what we claim is 1. The herein described composition of matter consisting of silicious lime stone which has been calcined and crushed, casein and water, substantially as described and for the purpose specified.

2. The herein described composition of matter for stopping punctures in pneumatic tires, consisting of silicious lime stone which has been -crushed and calcined eighty-seven and five-tenths parts, casein eight and threetenths parts, and water in quantity suflicient to give a consistency corresponding to cream, substantially as described.

In testimony whereof we have signed our names to this specificationin the presence of two witnesses.

Dated this 13th day of September, 1907.

LOUIS HENRY ROGERS. ALEXANDER MYERS.

Witnesses:

J. J. WATSON, I'IENRY JOHN PRIOR. 

